Origin of magnetoresistance suppression in thin γ-MoTe₂
classification
❄️ cond-mat.mtrl-sci
keywords
magnetoresistancegammamotethicknesscandidatecarrierclassicalconclude
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We use both classical magnetotransport and quantum oscillation measurements to study the thickness evolution of the extremely large magnetoresistance (XMR) material and type-II Weyl semimetal candidate, $\gamma$-MoTe$_2$, protected from oxidation. We find that the magnetoresistance is systematically suppressed with reduced thickness. This occurs concomitantly with both a decrease in carrier mobility and increase in electron-hole imbalance. We model the two effects separately and conclude that the XMR effect is more sensitive to the former.
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